Electrical pull-socket.



D. P. WOLHA UPTER.

ELECTRICAL PULL SOCKET.

APPLICATION FILED JAN. 28. 1911 1,001,330, Patented Aug. 22, 1911.

2 snsms-s1mm 1.

WITNESSES N [NVENTOR D. P. WOLHAUPTER.

ELECTRICAL PULL SOCKET.

APPLIOATION FILED JAN.Z8. 1911v 1,601,330, Patented Aug. 22,1911.

2 SHIJIITS'SHEET Z.

DAVID P. VV'OLHAUPTER, OF vVASI-IIIN'GTON, DISTRIC'I. OF COLUMBIA.

ELECTRICAL PULL-SOCKET.

Ill ,ti'tlil 33G Specification of Letters Patent.

tt 'atented Aug. 22, 191i.

AppIication filed January 28, 1911. Serial No. 305,209.-

To all whom it may concern:

Be it known that; it, Damn P, Wommue- (run, a citizen 0:1 lil eliillil'ttt States residing at Washington ijtistriet o't tilolumhia,have invented certain new and useful limprovements in EleetriealPulhSoekets, ol. whieh the :t'ollowing a speeitieation.

This invention relates to eleetrieal pull soelzets oi that type whereina pull ehain or equivalent ttexihle pull connection is employed foroperating the soelret. switeh to make and break the eleetrieal eireuitthrough the iiu-andesr-ent lamp.

To this end the present invention eon templates eertain novel andpraetic-al improvements which greatly simplify the eon z-atruetiou andmanufacture ol eleetrieal pull sockets. ionthe numher o'l' operatingparts and the arse and certainty with which sueh parts may be readilyassemhled and also disassembled.

A t ljirther ohjeet ot' the invention is to provide an improvedeonstruetion oi pull soeltet which entirely dispenses with the rateheteon'nnutator so eonu-uonly employed and which eomn'iutator involves theidea ot ratchet 'iueiines either on the praeelain ol the soeltet hotlyor on a rotating memlien said int-lines alternately presenting metal('ontaet tat-es and insulating taees that proride for the make andhrealt ot the eireuit. in place thereof, the present invention proposesto utilize a plain metal switeh ot a simple type but pret'e "ably havinga snapping action to seeure a quirk-break 'ol' the eireuit, ineomhination with a simple form of ratchet operating lneelmnism, and aninsulator between the two, whieh insulator is not only utilized totransmit motion to the switeh parts, out also aets as a eomplete insulatingeoveri'or the switch so as to pro- Vide a soelcet wherein theremay he said to be a perfect insulation for the parts of oppositepolarity so that there is no danger ot short eireuiting t'rom stray endsoil. wires at the wire tern'iinals or from other *auses. liesides, thisidea of insulation, as claimed herein, admits o'ti (lireet metalliceonneetion between the pull ehain and the pull lever ol' the operatingmeehanism.

T do not eontiue myself, in earryiirg out the ahore ohjeets. lo thepreeise details o'l" construetion oi? the Various parts of the socket,hut: preterrei l and praetieal en'ihodi partieularly with respeet toredueuu-uts thereof a re shown in the arreompanv ring drawings, inwhieh---- ltieure l is a longitudinal sectional view 0.1 a pull soeketemhot lying the present. in vention. Fin". 9 is a cross sectional viewon the line of Fig. 1. Fig. a similar View on the line 3-----3 o't Fig.1, and illustratingthe switeh closed, on one-quarter turn of the switehbloelt. Fin. 1- is a view similar to Fig. ishowing the other quarterturn of the hloelg wherein the circuit is opened by a quiek break. Fig.5 is a seetional view showing a moditieation in the switeh. l ig'. S isa seetional View on the line ti -t3 ot Fig. showing the switeh open.Fig. i' a perspeetive View showing the simple manner of assemhling theswitch operating meehanism with the rotating, switch hloeh and theinterposed insulator, the View illustrating the several parts inseparated relation.

liilce rel'erenees designate eorresponding parts in the several figuresat the drawings. A pull sot-hot, constructed in aeeordanee with thepresent inventiom ineludes in its organization the usual external socketeasing t. the interior insulating soeket hotly, the soehet switeln andthe switeh operatingmerhanism. The partieular ermstrlu-tion oi thesot-hot insulating hody is unimpm'tant; evept as to the provision forhousing the srviteh and insulating it from the operatii'lg merhanism andthe wire terminals. llenee, for illustrative purposes there is shown theeoui'enlioual l'orm ot soeltet hotly consisting ot two suitahlyeonneeted hloeks A and i3 ol porc-elain or eipiivalent insulatingmaterial. 'lhe soehet switeh may he eonveniently lorated within ahousing chamber 1 Ittftwfittl into the inner side oi. one of theinsulating" hloelts which may he the lower hloelc 15 shown in thedrawings, and as ahove indicated is intended to he completely insu latedfrom its operating mechanism and from the terminal plates to which thewire ends are eonneetod.

'lhe switeh proper which is preferably a1'- ranged as stated, mayconsist of any simple type of all metal snap switeh as distinguishedfrom a switeh ot the ratehet eommutatior type, but lfor purposes ol.illustration, there is shown in the drawings, in one ltlllifitllIiWlli.a quirk-break snap switeh eonsistin q' iii a s n-int: eonl'aet' plate 9,and a 1'0- tary eontaet member 3, the latter being: in

v the invention being described, acting as a 10 acts as a detenttherefor while the ratchet 1 plate takes up the movement and quicklysnaps lid electrical and metallic connection with one spring pressedsnapper plate 10, held under block3." Any suitable separable connectiona r ,M Q 1,0 1),

the form of an oblong switch bloc; sin'iilar to the corresponding blockemployed in the well known key sockets now on the market, The saidswitch block 3 is intended to be loosely mounted upon center supportingspindle 4 extending centrally through the blocks of the socket body and,in the form of center conducting screw which holds in place the centerplug contact 5 arranged at the under side of the lower block l3, Hence,in this form the spindle 4: acts as a conductor so that current passesthrough the same and the rotary member or switch block 3. When thelatter is in contact with the spring'contact plate 2, the switch parts,are placed in of the wire terminal plates 6 which may be used as auniting plate between the two insulating blocks, while the other wireterminal plate 7 performs a similar office and furthermore has a directmetallic screw connection 8 with the screw shell contact 9, all of whichplainly appears in Fig. 1 of the drawings.

The snapping action of the loose member or switch block 3 is efiected bymeans of the influence of the press spring 10 against the switch block 3at all times,and the pressure of this plate is exerted in line with thecenter of the axis for the switch block so that at each quarter turn ofthe block the element operating mechanism is resuming a fresh startingposition, as will be well understood by those skilled in the art. At thesame time, as the ends of the block 3 commence to pass off of the plates2 and 10, the latter the block around to the position shown in Fig. 4:,thus securing the quickbreak. I

The operating mechanism for the switch consists of a rotating ratchetmember or disk 11, an, oscillating ratchet member or pull lever 12, anda pull chain 13. The ratchet member 11 may consist of a disk in ringform having punched out or equivalent ratchet shoulders 1d, and punchedout or equivalent holding elements 15, the latter being separablyinterlocked in sockets or depressions 16 in the insulator 17 that isinterposed between the switch parts and the said. operating mechanism.This insulator may conveniently consist of a disk of insulating materialwhich is mounted to turn freely on the spindle 4t and carries with itthe switch may be rovided between the switch block and the insulator,such for instance as bolding projections 19 on the switch block separaby interlocking in sockets or depressions 20 provided in the insulator17.

The insulator or insulating disk 17, in the 1 form being described, isprovided with an insulating hub 21 which extends through the operatingmechanism and effectually insulates all metal parts from the centersupporting spindle d. Furthermore, the said insulator is arranged so asto wholly cover the housing chamber 1 and the switch therein,besides'being so located as to constitute an effective separator betweenall opposite polarity parts.

' The ratchet elements or shoulders 14 of the ratchet member 11 areadapted to be'engaged successively by the pawl or equivalent ratchetelement 22 of the ratchet part of the pull lever 12, and the latter isalso'provided with a chain holder or clip 23 to which is directlyconnected the metallic pull chain 13 that is guided to the exterior ofthe casing through the usual chain guide 24.

The pull lever '12 is normally retracted under the impulse of aretracting spring 25, one end of which as at 26, engages with the pulllever or its ratchet part," and the other end of which spring is engagedin anyone of a series of holes or equivalent keepers 27 provided in atension washer v28 This washer is of an angular form and is looselyseated in. correspondingly shaped seat 29 "look A. The tension ofthespring 25 may increased or diminished as desired by aging the positionof one end A proper keeper 27 of the. washer fig the latter oneway orthe other, to atent desired, and then dropping it back into its seat 29in which it'is held interlocked with the angular faces of.

the latter. ffhe extent of movement of the pull lever in both directionsmay be defi n tely' determined by the simple use of a stop gaging in alnnlting slot 31 provided in the u lever member.

A modification or the invention is sug r gested in Figs. 5 and 6 of thedrawings,

wherein the switch proper is shown as con-i sisting or the snapper plate10 and a spring contact plate 2 the latter being adapted to be engagedand disengaged by the snapper plate to close and open the circuit, andthe switch block 3'" being an integral or rigid part of theinsulator-17. In this form. of

the invention the insulator does not require the hub 21, as the centerplug contact of the socket has a direct metallic connection with one ofthe wire terminal plates X, While, as shown, the switch 2 and 10 isincluded in the opposite side of'the circuit with the other wireterminal plate. 7 and with the screw shell contact 9. In other respects,the modification described possesses all of the desirable teatrreshereinbefore specified.

rovided in the under side of the insulating 30 mounted in the socketbody and enor other convenient part of the pull in the operation of thesocket, it will be 1 oflice as hereinbefore referred to. Mention hasalready been made of the successive quarter turns, ot the switch blockto first open and then close the circuit, and with the snapper plate 9acting as a detent, the parts ll; 17 and '3 are held stationary whilethe pull lever 12'is retracted through its idle movement by the springOn i ts forward movement the pull lever 12 moves through a quartercircle, determined by the stop 30-31, and in such inoven'ient engagesthe ratchet elements 14 to rotate the member I t and the parts connectedtherewith. During the forward movement of the pull lever when thesnapping action of the switch block takes Jlace, the parts 3, 17 and 11simply snap ahead oil. the pull lever till brought to a stop by theswitch block reaching the position shown in Fig. 4.

I claim:

1. A pull socket comprising a chambered body, a switch arranged withinthe chamber of the body, metallic operating means ineluding a pullchain, and an insulator interposed between the operating means andswitch and arranged to cover the latter in its chamber.-

2. A pull socket comprising an insulating body, a stationary centerspindle fitted in the body, a snap switch seated within the body andincluding a rectangular switch block loosely mounted on the spindle andfreely rotatable about the same, snapping means for the switch block,metallic operating means for turning the switch block independent of thespindle on which it is supported, and insulatii'ig means for the me- .tallic operating means.

A pull socket. comprising a chambered insulating body, a stationarycenter spindle titted within the body, a snap switch seated within thechamber of the body and including a rectangular switch block andsnapping means therefor, said switch block being loosely mounted on thespindle and freely rolatalilc on and about the same, and op-- eratingmeans for the switch including a pull chain.

i. A pull socket comprising a chambered bot 1y, a snap-switch. seatedwithin the chamher of the body and including a rotary reetangular switchblock and snapping means tht-rcl'or, metallic operating means includinga. pull chain, and an insulator arranged as a cover for the switch andinterposed between the latter and the operating means.

ii. A pull socket comprising a chambered body, a snap switch seated inthe chamber of the body and including a rotary reetangular switch blockand snapping means there- 'lor, an insulator arranged at one side of theswitch block and connected therewith, said insulator acting as a switchcover and having a hub, and metallic operating means pirotally hung uponsaid hub.

.ln testimony whereof I hereunto atlix my signature in the presence oftwo witnesses.

DAVID l. WOLl lAUltllG 1t.

\Vitncsses:

R. G. BRADDOCK, A. M. Pamuns.

